From f4ac5ea179af244fcb839ce20d528153f0267917 Mon Sep 17 00:00:00 2001
From: Frank Chu <Frank_Chu@pegatron.corp-partner.google.com>
Date: Thu, 19 Jan 2023 16:15:13 +0800
Subject: mb/google/brya/var/marasov: Turn off camera power during S0ix

Turn off camera power during S0ix to improve power consumption.

BUG=b:265754302
BRANCH=firmware-brya-14505.B
TEST=emerge-brya coreboot chromeos-bootimage

Signed-off-by: Frank Chu <Frank_Chu@pegatron.corp-partner.google.com>
Change-Id: Ie2b300783adfc1cab30bc897d086a3674436724a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72089
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Frank Chu <frank_chu@pegatron.corp-partner.google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
---
 src/mainboard/google/brya/variants/marasov/Makefile.inc    |  2 ++
 .../google/brya/variants/marasov/include/variant/gpio.h    |  2 ++
 src/mainboard/google/brya/variants/marasov/variant.c       | 14 ++++++++++++++
 3 files changed, 18 insertions(+)
 create mode 100644 src/mainboard/google/brya/variants/marasov/variant.c

(limited to 'src/mainboard/google/brya/variants')

diff --git a/src/mainboard/google/brya/variants/marasov/Makefile.inc b/src/mainboard/google/brya/variants/marasov/Makefile.inc
index 4d25f34ea1..70f64013b4 100644
--- a/src/mainboard/google/brya/variants/marasov/Makefile.inc
+++ b/src/mainboard/google/brya/variants/marasov/Makefile.inc
@@ -7,3 +7,5 @@ ramstage-$(CONFIG_FW_CONFIG) += fw_config.c
 romstage-y += memory.c
 
 ramstage-y += gpio.c
+
+ramstage-y += variant.c
diff --git a/src/mainboard/google/brya/variants/marasov/include/variant/gpio.h b/src/mainboard/google/brya/variants/marasov/include/variant/gpio.h
index c4fe342621..f62197dfe6 100644
--- a/src/mainboard/google/brya/variants/marasov/include/variant/gpio.h
+++ b/src/mainboard/google/brya/variants/marasov/include/variant/gpio.h
@@ -5,4 +5,6 @@
 
 #include <baseboard/gpio.h>
 
+#define CAM_PWR GPP_A17
+
 #endif
diff --git a/src/mainboard/google/brya/variants/marasov/variant.c b/src/mainboard/google/brya/variants/marasov/variant.c
new file mode 100644
index 0000000000..dad8a3c03b
--- /dev/null
+++ b/src/mainboard/google/brya/variants/marasov/variant.c
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <acpi/acpigen.h>
+#include <baseboard/variants.h>
+#include <variant/gpio.h>
+
+void variant_generate_s0ix_hook(enum s0ix_entry entry)
+{
+	/* Add board-specific MS0X entries */
+	if (entry == S0IX_ENTRY)
+		acpigen_soc_clear_tx_gpio(CAM_PWR);
+	if (entry == S0IX_EXIT)
+		acpigen_soc_set_tx_gpio(CAM_PWR);
+}
-- 
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